Dwight-Englewood School owns a School License for the Gradekeeper grade book software for Windows and online web use.
Mac OS X. A licensed copy of the software is available to any teacher while they are employed at D-E.
To install, download and run the software appropriate for your Windows
or Mac computer from here. The publisher of Gradekeeper as stopped developing the Mac version of Gradekeeper and has replaced it with a web version of the app instead:
From the developer: "Apple will soon stop supporting 32-bit apps on Mac OS. Gradekeeper for Mac is a 32-bit app. To use Gradekeeper on a Mac, you should use the Gradekeeper web app. "
The web version of Gradekeeper is available for use with either Google Drive or Dropbox .com:
You can use the web version on a Mac or Windows computer. You will store your work in either a Google Drive or Dropbox.com. More information is in the Gradekeeper User's Guide.
To use a paid licensed version of the program at no additional cost to you, enter the license information here when prompted. (The web page with the license information requires you to login using your D-E username and password.)
P.S. In addition to Gradekeeper, a grade book in My DE is also available. More information is here.